Valve



UNI-TED STATES PATENT OFFICE.

ELTON TWLE, OF PATERSON, NEW JERSEY, ASSIGNOR 0F ONE-HALF T0 ('JrEORGrE DE LAVAL, OF ORANGE, NEW JERSEY.

VALVE.

Application led'March 5, 1919. Serial No. 280,841.

To all whom. t may concern:

Be it known that I, EL'roN L. TowLE, a

' citizen of the United States, residing at Paterson, in the county 0f Passaic and State of New Jersey, have invented certain new and useful Improvements in Valves, of

which the following is a specification.

This invention relates to valves of the type employing a thi'n iexible valve me1n ber and especially adapted for use in pumps for air or other gases.

One of the objects of the invention is to provide such a valve which is inexpensive to manufacture and maintainv and which is positive in its action. l

W'ith these and other objects in view my invention consists of certain novel features 'of construction, combination and arrangement of parts as will be more fully described and pointed out in the appended claims.

In the drawings Figure 1 is a plan, with some of the parts partially broken a'way, of a square plate valve of a form which I have adopted for purposes of illustration, showing one arrangement of my novel valve; Fig. 2 is a vertical section on line 2 2 of Figi; 1; Fig. 3 is a section on the line 3-,3 of ig. 2; Fig. 4 is a section on line 4-4 of Fig. 1; Fig. 5 is a bottom View of the valve cap looking in the direction of th-e arrow 5 1n Fig. 2; Fig. 6 is a cross section of a modification of the form of valve illustrated in The corresponding parts are referred to both in the drawings and in the specification by similar reference characters..

In the illustrative form of valve, 10 is a valve seat member, the upper surface of which preferably is ground flat and true. A series of ports 11 are provided on either side of the center line of the valve seat so 'that there is a solid `central portion 12. If

Superimposed on the valve seat 10 is av valve cap 13 comprising, in the illustrative form, a rectangular plate with members 15 attached by suitable fastenings 19 to the cap 13. The cap '13 is provided with a series of openings 18 which are located in staggered relation with the ports 11 in the valve seat.

In the form illustrated, the valve Iis a l thin elastic strip 17 of steel or the like, which normally contacts with the flat face of the illustrative form is only slightly wider than the valve 17- and slightly longer than the valve, the ends of the recess being limited bythe members 15; These ,clearances permit the valve to have an entirely free'motion in the recess.

Preferably I make the recess 14 angular tothe face of the cap 13 with the shallowest portion of the recess oppositethe solid portion 12 ofthe valve seat 10, the recess at the point 16A being deep enough, however, notto subject the valve to any pressure. From the central portion '16 Lthe recess increases in depth, as shown best in Fig. 2,

this depth being arranged so as to limit the amount of opening of the valve 17 without restricting its bending around the portion 16 in any manner.

When. the valve is in use aS,-;f ir instance, in an air pump, the pressure through the ports 11, will lift thevalve 17 and bend it around its central portion and the central portion 16 of the valve cap 13. The fluid passing through the ports 11 moves through the recess' 14 and into the openings 18. As soon as the pressure is reversed the valve is drawn down to its normal position in contact with the valve seat. v

It will be seen that I have provided a valve which is substantially unrestrained in -sufliciently confined so that it will never be displaced from its operative position. Moreover, it will be seen. that the valve is permitted to bend in the most natural way so that it can assume the curve which would be assumed by a uniformly loaded beam. Consequently, there are no undue strains on any portion of the valve whereby constant repetition of the bending y will tend to break it.

Whilev I prefer the arrangement illustrated, it will be obvio-us that my novel device may be varied within wide limits. For instance, instead of having a spring with bot-h ends bending, it will vbe. possible to employ one-half of the valve arrangement which I have illustrated, in which case the valve seat would extend `only slightly to one side of its center line i Fig. 2. In such case, the valve would' bend around' a substantially fixedend as the other end .moved toward and away from the valve seat. l Such an arrangement is illustrated in Fi 6., Whatl claim and desire to secure by Letters Patent of the AUnited States is f l. A valve seat1 a thin, elastic imperforate strip forming avalve, and a cap to maintain the -valve in operative relation to the valve v seat without pressure on any part of the 'valve,ithe cap'being constructed and arranged to permit the valve to bend' freely around its center portion to permit the ends of the valve to move toward and away from the valve seat while maintaining the center portion relatively stationary, the cap being also arranged to limit the motionof the ends of the valve away from the valve seat.

3. A valve seat, a thin, elastic strip forming a valve, and a cap extending over the valveseat and provided with a recess for the valve, the recess being adapted to permit the valve tomove bodily and to bend freely around its center portion to permit the ends of thevalve to move toward and away from the 'valve seat while maintaining the center portion relatively stationary.

4. A valve seat,la thin, elastic strip; forming a valve, and a cap extending `over the valve seat and provided with a recess for the fvalve, the recess being adapted to permitthe valve to move bodily and to bend freely aroundl its center portion to permit the ends of the valve to move toward and away lfrom 'thevalve seat while maintaining the center portion relatively stationary, said recessbeing valso adapted to prevent `lateral andlongitudinal displacement .of the valve relantively to the valve seata 5.l A valve seat, a thm, elastic forming a valve, and a cap extending over the.

ing a valve, and a cap extendlng over the i valve seatfand provided with a valve recess slightly wider and longerthan the valve-and thickness' of the valve land increasing in depth from its centerportion to its ends".

7. A flat valve seat having a pair of elongated ports on either side of the center of the valve seat, a thin, elastic imperforate strip forming a valve to cover the ports in the valve seat,' and ai cap extending over the v alve seat and provided with openings out of alinementwiththe ports, the cap being provided with a valve rfeess slightly Wider and longer than the valvdand slightly deeper at its center'portion' than the thickness of the valve and increasing indepth from its center portion td its. ends5 every part 'of saidv valve being free to move within thev limits of said recess.

f ELroN L. ToWLE.

65l slightly deeper at its center portion than the i 

